Pool B of the 2026 World Baseball Classic (branded as the World Baseball Classic 2026 Houston Capital One for sponsorship reasons) took place from March 6 to 11, 2026, at Daikin Park in Houston, Texas. The second of four pools, the top two teams automatically qualified for the top-eight knockout stage, beginning with quarterfinals in Houston and Miami, Florida.
The group consisted of the United States (co-host), Mexico, Italy, Great Britain, and Brazil. Italy exceeded expectations by going undefeated in pool play and securing the top spot in the quarterfinals. Following Italy's win against Mexico in the final game of the pool, the United States clinched the second place spot, despite fears of their elimination following their upset loss to Italy. Brazil was relegated after failing to win a game and must re-qualify for the next edition of the tournament.
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